package cn.gdcp.listview2;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity implements IOnDelListener{
    private ListView stuListView;
    private ArrayList<Student> studentArrayList=new ArrayList<>();
    private ArrayList<Student> searchResultList=new ArrayList<>();
    private StuAdapter adapter;
    private Button btnAddStu;
    private EditText edtKeyword;
    private Button btnSearch;
    private boolean isResultList; //判断是不是从结果列表中点击信息

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initStuArrayList();
        initAdapter();
        initListView();
        initAddBtn();
        initSearchView();
}
    /*初始化搜素模块*/
    private void initSearchView() {
        edtKeyword=findViewById(R.id.edt_keyword);
        btnSearch=findViewById(R.id.btn_search);

        btnSearch.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //1.获取搜索框内的关键字
                String keyword=edtKeyword.getText().toString().trim();
                //trim() 清除关键字左右的空格
                //2.使用学生列表和关键字 得到搜索结果列表
                search(studentArrayList,keyword);
                adapter.changeData(searchResultList);
                isResultList=true;
            }
        });
        //当文字发生改变就自动搜索
        edtKeyword.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void afterTextChanged(Editable editable) {
                //1.获取搜索框内的关键字
                String keyword=edtKeyword.getText().toString().trim();
                //trim() 清除关键字左右的空格
                //2.使用学生列表和关键字 得到搜索结果列表
                search(studentArrayList,keyword);
                adapter.changeData(searchResultList);
                isResultList=true;
            }
        });
    }

    /*使用学生列表和关键字 得到搜索结果列表*/
    private void search(ArrayList<Student> studentArrayList,String keyword){
        searchResultList.clear(); //在结果列表添加新的搜索结果时先删除掉原来的结果
        for(int i=0;i<studentArrayList.size();i++){
            Student s=studentArrayList.get(i);
            //如果学生姓名包含了关键字 这个学生就添加到结果列表
            if(s.getName().contains(keyword)){
                searchResultList.add(s);
            }
            //如果学生年龄等于关键字 这个学生就添加到结果列表
            else if(String.valueOf(s.getAge()).equals(keyword)){
                searchResultList.add(s);
            }
        }
    }
    /*初始化添加学生按钮*/
    private void initAddBtn() {
        btnAddStu=findViewById(R.id.btn_addStu);
        btnAddStu.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent();
                intent.setClass(MainActivity.this,AddActivity.class);
                startActivityForResult(intent,1001);
            }
        });
    }

    /*初始化ListView*/
    private void initListView() {
        stuListView=findViewById(R.id.name_listview);
        stuListView.setAdapter(adapter);

        stuListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                Student s=studentArrayList.get(i);

                //如果是从结果列表中点击信息，编辑页面为结果列表的顺序信息
                if(isResultList){
                    s=searchResultList.get(i);
                }

                Toast.makeText(MainActivity.this,
                        "姓名"+s.getName() + " 年龄"
                                +  s.getAge(),
                        Toast.LENGTH_SHORT)
                        .show();

                Intent intent=new Intent();
                intent.setClass(MainActivity.this, EditActivity.class);
                intent.putExtra("NAME",s.getName());
                intent.putExtra("AGE",s.getAge());
                intent.putExtra("IMG",s.getImgId());
                intent.putExtra("NO",s.getNo());
                startActivityForResult(intent,1002);
            }
        });
    }

    /*初始化适配器*/
    private void initAdapter() {
        adapter=new StuAdapter(MainActivity.this,studentArrayList,
                MainActivity.this);
    }

    protected void onActivityResult(int requestCode,int resultCode,Intent data){
        Log.e("MainActivity","requestCode="+requestCode+"resultCode="+resultCode);
        if(data==null){
            return;
        }
        if(resultCode==2001){
            String name=data.getStringExtra("NAME");
            int age=data.getIntExtra("AGE",0);
            int imgId=data.getIntExtra("IMG",R.drawable.dog1);
            Student s=new Student("18001",name,age,imgId);
            studentArrayList.add(s);
            adapter.notifyDataSetChanged();
        }
        else if(resultCode==3001){
            String name=data.getStringExtra("NAME");
            int age=data.getIntExtra("AGE",0);
            int imgId=data.getIntExtra("IMG",R.drawable.dog1);
            String no=data.getStringExtra("NO");

            for(int i=0;i<studentArrayList.size();i++){
                Student s=studentArrayList.get(i);
                if(s.getNo().equals(no)){
                    s.setName(name);
                    s.setAge(age);
                    s.setimgId(imgId);
                }
            }
            String keyword=edtKeyword.getText().toString().trim();
            //trim() 清除关键字左右的空格
            //2.使用学生列表和关键字 得到搜索结果列表
            search(studentArrayList,keyword);
            adapter.changeData(searchResultList);
            isResultList=true;


            adapter.notifyDataSetChanged();
        }

    }

    private void initStuArrayList() {
        Student s1=new Student("18001","张一",18,R.drawable.dog1);
        Student s2=new Student("18002","张二",19,R.drawable.dog2);
        Student s3=new Student("18003","张三",20,R.drawable.dog3);
        Student s4=new Student("18004","张四",21,R.drawable.dog4);
        Student s5=new Student("18005","张五",22,R.drawable.dog5);
        studentArrayList.add(s1);
        studentArrayList.add(s2);
        studentArrayList.add(s3);
        studentArrayList.add(s4);
        studentArrayList.add(s5);
        /*studentArrayList.add(s1);
        studentArrayList.add(s2);
        studentArrayList.add(s3);
        studentArrayList.add(s4);
        studentArrayList.add(s5);*/
    }

    @Override
    public void del(int i) {
        Log.i("MainActivity","del"+i);
        studentArrayList.remove(i);
        adapter.notifyDataSetChanged();

    }
}
